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PREPARATION OF TiNi SHAPE MEMORY ALLOY POROSINT BY SHS

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中国有色金属学会会刊:英文版 1997年第4期7卷 85-88页

作者： Chu Chenglin Li Bo Wang Shidong Zhang Shuge Yang Xiaoxi yin zhongda Box 433School of Materials Science and EngineeringHarbin Institute of Technology ‚Harbin150001 Analysis and Testing CenterSoutheast University ‚Nanjing210018 Research Institute of Electric Light Source MaterialsMinistry of Light Industry ‚Nanjing 210015

TiNi shape memory alloy porosint, a promising artificial bone material, was prepared by self propagating high temperature synthesis method. It is found that the key technical parameter affecting the porosity, the shape and distribution of the bores in the synthesized product is the pre heating temperature of green compact. While the pre heating temperature varies between 523 K and 673 K, the TiNi shape memory alloy porosint with wholly homogeneously distributing bores will be gained. The porosity of the porosint is 70% when the pre heating temperature is near 673 K, which is maximal under different pre heating temperatures. The compressive strength of TiNi SMA porosint with a porosity of 70% manufactured by SHS is up to 100 MPa and the percentage recovered is 92%.

关键词： TiNi shape memory alloy porosint self-propagating high-temperature synthesis

MICROSTRUCTURE　AND　THERMAL　STRESS　RELAXATION　OF　ZrO_2－Ni　FUNCTIONALLY　GRADED　MATERIAL

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中国有色金属学会会刊：英文版 1996年第4期6卷 94-99页

作者： Zhu Jingchuan yin zhongda Lai Zhonghong Li Jian(School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001) HARBIN INST TECHNOL SCH MAT SCI & ENGNHARBIN 150001PEOPLES R CHINA

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关键词： functionally graded material zirconia nickel microstructure thermal stress relaxation

TRANSFORMATION INDUCED SUPERPLASTICITY IN 18Ni MARAGING STEEL

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Acta Metallurgica Sinica(English Letters) 1992年第4期5卷 278-281页

作者： yin zhongda Harbin Institute of Technology,Harbin,ChinaZHOU Yongkang Shanghai Centrifugal Machinery Research Institute,Shanghai,China Harbin Inst of Technology Harbin China

After exploring the influence of stress,cold-rolling reduction and cooling rate on transforma- tion induced strain,the transformation induced superplasticity forming technique of the 18Ni maraging steel(2450 MPa)was *** 14 times γα′ cyclic transformation,the limited elongation of 320% can be obtained in 60% cold-rolled *** observation revealed that the morphology of stress induced martensite is massive.

关键词： maraging steel transformation induced superplasticity cold-rolling

Fabrication of ZrO_2/Mo-Si/Ni Functionally Graded Material by Dip-Coating

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Journal of Materials Science & Technology 2003年第1期19卷 63-65页

作者： Mingwei LI, Jingchuan ZHU, zhongda yin and Gang ZENGSchool of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China Sch. of Mat. Sci. and Eng. Harbin Inst. of Technol. Harbin 150001 China

A slurry dip-coating technique was developed for fabrication of Zr02/Mo-Si/Ni functionally graded material (FGM)on the stainless steel substrate. The rheological behavior of ZrO2-Ni-ethanol slurry was characterized by viscositytest. The amount of polyvinyl butyral (PVB) additives, which served as the dispersant and binder in ZrO2-Ni-ethanolslurry, was optimized. The results showed that the characters of mixed slurries with added 9 vol. pct (relativelyto total powders) MoSi2 powders prepared by mechanical alloying changed little. The stainless steel substrate wascoated several times by dipping in the slurries, and followed by drying in air every dipping. After debinding in Arin graphite die, the coated FGM plate was finally hot pressed at 1300℃ for 1 h under the pressure of 5 MPa in Arin the same die. Microstructural observations of the sintered FGM specimens revealed that the graded layers wereformed on the stainless steel substrate, in which no cracks were observed.

关键词： Slurry dip-coating technique Functionally graded material (FGM) Polyvinyl butyral (PVB)

Synthesis of MoSi_2 by Mechanical Alloying

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Journal of Materials Science & Technology 2001年第1期17卷 15-16页

作者： Mingwei LI Jingchuan ZHU zhongda yin Xiaoqiang LI and Zuyan LIU School of Materials Science and Engineering, Harbin institute of Technology, Harbin 150001, China Jae-Ho Jeon Department of Materials Engineering, Korea institute of Machinery and Material Harbin Inst Technol Sch Mat Sci & Engn Harbin 150001 Peoples R China Korea Inst Machinery & Mat Dept Mat Engn Changwon 641010 Kyungnam South Korea

The microstructure evolution of mechanical alloyed Mo-66.7%Si powder using the high-energy ball mill has been studied by X-ray diffraction and scanning electron microscopy. The results showed that MoSi2 can be synthesized by MA of Mo-66.7%Si powder mixtures. Cold welding behavior between Mo and Si powders plays an important role in the preparation of MoSi2 by the MA.

关键词： MSR

Microstructure and Mechanical Properties of ZrO_2-Ni Functionally Gradient Material

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Journal of Materials Science & Technology 1994年第3期10卷 188-192页

作者： Jingchuan ZHU zhongda yin and Zhonghong LAI(Dept. of Metals and Technology, Harbin Institute of Technology, Harbin, 150001. China) Harbin Inst of Technology Harbin China

The fabrication. microstructure and mechanical properties of ZrO2-Ni functionally gradient materials (FGM ) have been studied. FGM as well as non-FG M of ZrO2-Ni system was developed by powder metallurgical process. X-ray diffractometer (XRD ). electron probe microanalyzer (EPMA), scanning electron microscope (SEM ) and optical microscope were employed to investigate the crystalline phases. chemical composition and microstructure Experimental results demonstrate that the composition and microstructure of ZrO2-Ni FGM have the expected gradient distribution. There are no distinct interfaces in the FGM due to the gradient change of components. that is, the constituents are continuous in microstructure everywhere. Moreover, Vickers hardness and flexural strength were measured for the common composites as a function of composition. It is made clear that the mechanical properties of the FGM vary corresponding to the constitutional changes as well

关键词： FGM PSZ Microstructure and Mechanical Properties of ZrO2-Ni Functionally Gradient Material Ni

Effect of Triple Annealing Treatment on Stress Relaxation of Ti-6Al-4V Alloy

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Journal of Materials Science & Technology 2004年第3期20卷 292-294页

作者： Yong LIU Jingchuan ZHU zhongda yin Mingwei LI School of Materials Science and Engineering, Harbin Institute of Technology Harbin 150001,China Sch. of Mat. Sci. and Eng. Harbin Inst. of Technol. Harbin 150001 China

The effect of triple annealing on stress relaxation of Ti-6Al-4V alloy as well as the microstructure after stress relaxation werestudied. The results showed that triple annealing treatment enhanced the resistance of stress relaxation performance, andwhen the temperature was rising, this effect became notable. The stress relaxation deformation mechanism is of dislocationcreep at 400℃ and recovery creep at 600℃.

关键词： Triple annealing Ti-6Al-4V alloy Stress relaxation

RECRYSTALLIZATION-INDUCED PLASTICITY IN 18Ni MARAGING STEEL UNDER ELASTIC STRESS

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Acta Metallurgica Sinica(English Letters) 1990年第2期3卷 128-131页

作者： yin zhongda Harbin Institute of Technology,Harbin,China ZHOU Yongkang Shanghai Centrifugal Machinery Research Institute,Shanghai,China yin zhongda Faculty of Heat Treatment of Materials,Harbin Institute of Technology,Harbin 150006,China

An approach to study the recrystallization-induced plasticity(RIP)phenomenon in the 18Ni maraging steel under the elastic stress has been made by the analysis of dynamic behaviour at elevated temperatures,the phenomenological analysis of dynamic strain feature curves,the confirmation of phase transformation point and TEM observation of RIP processing itself.

关键词： elastic stress recrystallization plasticity maraging steel

Preparation and Microstructure of a Si-Mo Fused Slurry Coating on Carbon/Carbon Composites for Oxidation Protection

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Journal of Materials Science & Technology 2001年第1期17卷 57-58页

作者： Haitao FANG Jingchuan ZHU and zhongda yin School of Materials Science and Engineering, Harbin institute of Technology, Harbin 150001, China Jae-Ho Jeon and Yoo-Dong Hahn Materials Engineering Department, Korea institute of Machinery & Materials, Changwon Korea Inst Machinery & Mat Dept Mat Engn Changwon 641010 South Korea Harbin Inst Technol Sch Mat Sci & Engn Harbin 150001 Peoples R China

A coating of composition Si-40Mo (wt pct) was prepared by fused slurry coating method on the two-dimensional carbon/carbon (2D-C/C) composite to improve oxidation resistance. In the procedure of the fabrication, pure St slurry inner layer in the pre-coating was necessary to apply because of infiltration of liquid Si into the substrate during the sintering. The coating consists of Si continuous phase and MoSi2 particles. In addition, the infiltration of Si into the substrate and the SiC reaction layer between the coating and the C/C composite were observed. Oxidation behavior of coated and uncoated C/C composites was studied in cyclic mode. The oxidation resistance and the thermal shock resistance of the Si-Mo fused slurry coating were quite excellent at 1370℃.

关键词： Si Preparation and Microstructure of a Si-Mo Fused Slurry Coating on Carbon/Carbon Composites for Oxidation Protection Mo